apm poweroff bug

["Shawn Smith" <shawn.smith@myrealbox.com>]

After giving a halt command, the system is normal until it gives the powerdown message, and then there is a dump of error messages.

This is on a 'freek box' -- a rebuilt computer at free geek in Portland OR.

We believe that this problem has to do with a bug in power management.

We are using kernel 2.6.

The attached text file is a parital copy of the system messages that appear after the powerdown message after all other systems have been halted.


Thank you for your time and efforts to maintain the kernel code.


Sincerely,


Shawn Smith



;; This buffer is for notes you don't want to save, and for Lisp evaluation.
;; If you want to create a file, visit that file with C-x C-f,
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    general protection fault:  fdf8 [#1]

  PREEMPT

Modules linked in: amp ipv6 lp autofs4 tsdev mousedev psmouse parport_pc parport floppy evdev pcskkr uhci_hcd ohci_hcd ehci_hcd usbcore snd_ens1371 snd_rawmidi snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_timer snd_ac97_codec snd soundcore gameport 8139cp pci_hotplug ali_agp agpgart 8139too mii capability commoncap ide_cd cdrom genrtc isofs ext3 jbd ide_generic ide_disk alim 15x3 ide_core unic font vesafb cfbcopyarea cfbimblt cfbfillrect

CPU:  0
EIP:  00c0: [<0000893d>] not tainted
EFLAGS:  00010046  (2.6.8-2-386)
EIP is at 0x893d
eax:0000fdfa ebx:00000001 ecx:00000001 edx:00000000 
esi:c89f8026 edi:00000202 epb:67890000 esp:c7601d98
ds:00c8 es:0000 ss:0068

Process halt (pid: 2580, threadinfo=c7600000 task=c74df6f0

Stack:
 0000fdfa  00000202  c89f8026  67890000  c7601dbc  00000001  00000000  00000001
 00005380  888a0046  80260202  1dd00000  00000001  53800003  820281d9  80260000
 0000c89f  1df26789  0001c760  00000000  00030000  53070000  00000000  00000000

Call Trace:

[<c89f4194>] apm_bios_call_simple+0x721/0xc3 [apm]
[<c89f4295>] apm_power_off+0x34/0x3b [apm]
[<c89f42b4>] printk+0xfb/0x11b
[<c011220b>] machine_power_off+0xb/0xc
[<c0122a86>] sys_reboot+0x16a/0x297
[<c024d3cd>] schedule+0x21f/0x3e6
[<c024d548>] schedule+0x3a4/0x3e6
[<c024d5b3>] preempt_chedule+0x29/0x41
[<c01208ff>] kill_proc_info+0x41/0x46
[<c0121d63>] sys_kill+0x4e/0x55
[<c01da737>] blkdev_ioctl+0x346/0x35b
[<c0153a7c>] block_ioctl+0x1a/0x1e
[<c0153a41>] sys_ioctl+0x1cd/0x214
[<c0153a7c>] sys_ioctl+0x208/0x214
[<c0105f97>] syscall_call+0x7/0xb

Code:  Bad EIP value
   <6>note: halt [2580] exited with preempt_count 2
  bad scheduling while atomic!

[<c024d1e0>] schedule+0x3c/0x3e6
[<c0138191>] unmap_vmas+0xe0/0x1cf
[<c0138213>] unmap_vmas+0x162/0x1cf